south river restoration

Featured Projects

The Annapolis Harbour Center Stream and Wetland project will improve habitat, increase floodplain connection, and prevent bed and bank erosion. This particular project focuses on controlling flows and providing habitat at the bottom of existing outfalls, through the use of a step-pool storm conveyance (SPSC) in ephemeral reaches (where water flows only after rain event) and riffle weirs and buried grade control structures in the intermittent and perennial reaches (year round flow).

This project is located in the Broad Creek watershed, one of the most impaired subwatersheds of the South River.  The Preserve at Broad Creek Restoration Project corrected a failing stormwater pond and its resulting unstable outfall into an ephemeral reach of a tributary of Broad Creek known as Durmont Branch.  The existing stormwater pond was reconfigured into a stormwater wetland to improve stormwater treatment and flatten peak volumes into the area downhill. The downhill ephemeral gully was stabilized to better handle stormwater flows and increase aquatic habitat complexity and diversity by creating ephemeral pools.  The site was heavily planted with native trees, shrubs, and plants known for providing food and or habitat for native fauna.  Construction and planting were completed in 2015.

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Photos Before and During Construction

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Photos After Construction

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Project Funded By:

DNRweb  WPRP logo CBT BayPlate Logogif 2010

There are four primary tributaries feeding Church Creek, one of the most highly degraded sub-watersheds on the South River.  One of them, the Wilelinor Stream Valley was restored in 2003 by Anne Arundel County and the Maryland State Highway Administration using sand seepage stream and wetland restoration techniques. The goal of this larger subwatershed restoration effort is to take the necessary steps to repair the other tributaries to Church Creek, using similar restoration methods as well as pond retrofits, upland bioretention practices, and living shoreline techniques to create a model sub-watershed restoration, and evaluate the impact of such cumulative work on the South River.

The Church Creek Headwaters Restoration Project is located just north of Route 665 (Aris T. Allen Boulevard) in Annapolis on a parcel that includes several acres of floodplain and steep slopes. The site represents the confluence of two major non-tidal tributaries to Church Creek, the most highly urbanized subwatershed of the South River. Currently, these tributaries are incised into a floodplain composed of over ten feet of aggraded legacy sediments that are exported to tidewater under storm flows through the rapidly eroding (widening) ditch channels. This project created several acres of stream and wetland habitat by raising the invert of the existing ditch channel in multiple locations and inundating or saturating the floodplain.

Anne Arundel County's Phase II WIP listed this site as moderately degraded and a high priority for restoration.  It is listed in our 2008 Watershed Restoration Plan as one of 30 high and medium priority restoration projects. 

2015 BUBBA First Place Award Winner for Best Habitat Creation

To see our Chesapeake Conservation Corps Volunteers capstone project analyzing the preliminary results of the project, view: Project Analysis.

                                                            

Church Creek Headwaters Before (left) & After (right)

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Photos of Church Creek Before and During Construction

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Photos of Church Creek After Construction

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Photos of the Fauna that Call Church Creek Home

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Project Funded By:

DNRweb MDE CBT BayPlate Logogif 2010